DE102005043266A1 - Piston pump - Google Patents

Piston pump

Info

Publication number
DE102005043266A1
DE102005043266A1 DE200510043266 DE102005043266A DE102005043266A1 DE 102005043266 A1 DE102005043266 A1 DE 102005043266A1 DE 200510043266 DE200510043266 DE 200510043266 DE 102005043266 A DE102005043266 A DE 102005043266A DE 102005043266 A1 DE102005043266 A1 DE 102005043266A1
Authority
DE
Germany
Prior art keywords
piston
stepped
spring
stepped piston
return spring
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
DE200510043266
Other languages
German (de)
Inventor
Dieter Dinkel
Albrecht Otto
Georg Sonnenschein
Kristian Tarandek
Hans-Georg Zentgraf
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Continental Teves AG and Co oHG
Original Assignee
Continental Teves AG and Co oHG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority to DE102004050579.9 priority Critical
Priority to DE102004050579 priority
Application filed by Continental Teves AG and Co oHG filed Critical Continental Teves AG and Co oHG
Priority to DE200510043266 priority patent/DE102005043266A1/en
Publication of DE102005043266A1 publication Critical patent/DE102005043266A1/en
Application status is Withdrawn legal-status Critical

Links

Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04BPOSITIVE DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B1/00Multi-cylinder machines or pumps characterised by number or arrangements of cylinders
    • F04B1/04Multi-cylinder machines or pumps characterised by number or arrangements of cylinders having cylinders in star- or fan-arrangement
    • F04B1/0404Details, component parts specially adapted for such pumps
    • F04B1/0426Arrangements for pressing or connecting the pistons against the actuated cam
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60TVEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
    • B60T8/00Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force
    • B60T8/32Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force responsive to a speed condition, e.g. acceleration or deceleration
    • B60T8/34Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force responsive to a speed condition, e.g. acceleration or deceleration having a fluid pressure regulator responsive to a speed condition
    • B60T8/40Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force responsive to a speed condition, e.g. acceleration or deceleration having a fluid pressure regulator responsive to a speed condition comprising an additional fluid circuit including fluid pressurising means for modifying the pressure of the braking fluid, e.g. including wheel driven pumps for detecting a speed condition, or pumps which are controlled by means independent of the braking system
    • B60T8/4031Pump units characterised by their construction or mounting
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04BPOSITIVE DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B1/00Multi-cylinder machines or pumps characterised by number or arrangements of cylinders
    • F04B1/04Multi-cylinder machines or pumps characterised by number or arrangements of cylinders having cylinders in star- or fan-arrangement
    • F04B1/0404Details, component parts specially adapted for such pumps
    • F04B1/0408Pistons

Abstract

The invention relates to a piston pump (10) for a hydraulic consumer of an electronically controlled vehicle brake system, comprising a stepped piston (50, 50 ') which is hollow at least at one end (51, 51'), the stepped piston (50, 50 '). ) carries and centers a sealing arrangement (26, 26 ') which is held in the axial direction Ax on the one hand by a step (52, 52') on the stepped piston (50, 50 ') and on the other hand by a spring cage (53, 53') is held , the stepped piston (50, 50 ') has a planar support (54, 54') for planar support legs (55a, b, c, 55a, b, c ') of the spring cage (53, 53'), radially inward of the Support (54, 54 ') has the stepped piston (50, 50') via a stepped bore (56, 56 '), said bore (56, 56') centering legs (57a, b, c, 57a, b, c ' ) of the spring cage (53, 53 ') receives coaxially and within the stepped bore (56, 56') is a spring-biased valve body (59, 59 ') of a check valve a return spring (38) is supported on the one hand on an abutment (41) of the bushing (18, 19) and on the other hand on the spring cage (53, 53 '), the bushing (18, 19) has a stop (63, 63 ') for the stepped piston (50, 50'), so that stepped piston (50, 50 '), return spring (38), check valve and seal assembly (26) can be arranged as independently manageable assembly within the bushing (18, 19).

Description

  • The The invention relates to a piston pump for conveying pressure medium in a hydraulic consumer of an electronically controlled vehicle brake system. This consumer can in principle be at least one Vehicle brake, or to a master cylinder, or to a pressure medium container, or to act a pressure fluid reservoir. In principle, a supply several of the mentioned consumers or a supply of combinations the mentioned consumers possible.
  • at known piston pumps is a piston in a stepped bore of a receiving body movably arranged. The piston is guided directly in the receiving body, and check valves are provided, which serve the ventilation of a working space. The workroom is limited by the piston. A return spring is in the working space between an abutment and a spring pot supported on the piston. The Stepped bore is by means of a closure of the environment separated.
  • From the EP 0 734 494 B2 a piston pump has become known whose piston is arranged guided directly in the pump housing. The spring cage for the valve components is designed as a sheet-metal shaped part, characterized in that the piston, the return spring, and a valve assembly are secured together as an independently manageable assembly together. This special measure makes it possible to rationalize a bushing, which causes the cohesion of the components of a piston pump.
  • A major disadvantage of the piston pump according to EP 0 734 494 B2 is, however, that their axial length is in need of improvement. The degree of miniaturization is insufficient. On the one hand, this is due to the fact that pump pistons and check valves are arranged axially one behind the other. Furthermore, the special function of the spring cage requires an axial mounting portion, which engages over a front part of the pump piston on the outside, and engages from radially outside positively into a groove of the pump piston. The sealant should be located at an axial distance from the end of the piston. Finally, the support of the return spring on the piston is in need of improvement, because the clip-like attachment of the return spring on the spring cage requires a high-precision tolerancing of the spring cage and further a high-precision tolerancing of the spring diameter. This increases the manufacturing costs, because in particular the return spring is a metallic, heat-treated component, which suffers unavoidable dimensional changes due to heat treatment. In order to enable a secure cohesion of the components involved, a highly accurate tolerated production of the spring cage is required.
  • The Invention is based on the task of providing a piston pump, their axial length with improved support reduced the return spring is, and wherein still the essential components of the piston pump bundled as a subassembly can be easily mounted in a receiving body in the form of a cartridge.
  • The Task is with the features of the independent claim at solved a piston pump, which has the following features. A stepped piston is in a stepped bore of a receiving body within a bushing is arranged movable in the axial direction, the stepped piston is at least partially tubular hollow, a displacement space is through an end limited to the stepped piston and is stepped graduated on the outer circumference, and carries and centers a seal assembly, in the axial direction of one hand a stage is held on the stepped piston, and in the axial direction on the other hand held by a spring cage is equipped, the graduated piston radially inward, relative to the step, over a flat support for plane Support leg of the spring cage, the stepped piston has radially inside, based on the support, via a stepped bore, wherein the bore receives centering legs of the spring cage, coaxially as well inside the stepped bore is a valve body of a check valve arranged, which serves the ventilation of the working space, a Return spring is in the repression room arranged, and supports on the one hand on an abutment of the liner and on the other on the spring cage starting to form an independent Handleable pump cartridge, including stepped piston, bushing, Return spring check valve and seal assembly, the liner is at one end with a Stop for provided the stepped piston, wherein the stop in the radial direction smaller than the diameter of the stepped piston is formed while on opposite End of the bush at least one separate component as an abutment for the Return spring is attached. The piston pump according to the invention solve the above problems and also provides an improved conveying behavior at low temperatures because of the proposed construction improved suction allows.
  • to Biegemomentenfreien force introduction has the flat support a average diameter, which is substantially equal to the diameter of the Piston return spring coincides.
  • Around damage to avoid the stepped bore by the piston return spring, shows the spring cage additional Centering leg for the return spring on.
  • Of the Material is used particularly efficiently when the support legs and the centering legs of the spring cage alternately in the circumferential direction are provided.
  • A static certain force application and component support is scored, if in each case at least three support legs and respectively at least three centering legs are provided.
  • Metal Forming Manufacturing operations are relieved by the centering legs for the return spring, and the centering legs for the spring cage are each arranged at right angles to the support legs.
  • A particularly space-saving arrangement is made possible by the Zentrierschenkel for the spring cage, and the centering legs for the return spring pointing in diametrically opposite directions.
  • mounting problems be solved if the centering legs for the spring cage and the centering legs for the helical Return spring integrally formed are, wherein the Zentrierschenkel for the return spring radially inside in the return spring can intervene, or can overlap the spring coils radially outside.
  • Of the spring cage is for optimized for use with small caliber or large caliber piston pumps. Thus, the preferred variant for large caliber characterized by the fact that the centering legs for the spring cage and the centering legs for the return spring are each formed separately, wherein the Zentrierschenkel for the return spring these overlap radially on the outside. A preferred solution used in small caliber piston pumps is characterized in that each centering leg more Fulfilled tasks, having a resilient spring portion, and wherein the spring legs in the interior of the piston return spring intervention.
  • Around the life of the check valve too increase, and an increased To achieve safety against spring breakage, the spring cage has means which an opening stroke of the valve body limit. To enable a forming process, the means are designed as legs, on which the valve body after a defined opening stroke strikes. For one statically defined support the legs are arranged distributed in the circumferential direction.
  • A particularly cost-effective Variant of the present invention is characterized in that the spring cage as one piece Sheet metal part is formed, that the material of the spring cage a has uniform thickness, and that the legs and the stops as notches or characteristics of the sheet metal part are provided.
  • The Invention will be described below with reference to preferred embodiments, which are reproduced in the drawing, described in more detail. In the drawing shows:
  • 1 a known unit with a piston pump according to DE 103 46 237.6 enlarged as well as on average,
  • 2 an improved piston pump increases and, on average,
  • 3 an enlarged view of a spring pot of the pump after 2 .
  • 4 an enlarged perspective view of a spring pot,
  • 5 a further embodiment of an improved piston pump enlarged and in section,
  • 6 an enlarged perspective view of a spring pot of the pump after 5 , and
  • 7 an enlarged section through a spring pot.
  • The 1 refers to an aggregate 1 with a schematically sketched drive 2 , in particular an electric motor, which on one side on a receiving body 3 for electromagnetically operated valves, channels, storage or damper chambers and a piston pump 10 is flanged. On an opposite side of the receiving body 3 is a, only schematically illustrated, electronic control unit 4 intended.
  • The illustrated unit 1 is used in particular for the slip or driving stability control of motor vehicles. Such Bremsanlangen are often referred to with abbreviations such as ABS, ASR, ESP or FDR. In the brake system, the piston pump is used for example for returning brake fluid from a wheel brake cylinder or several wheel brake cylinders in a master cylinder (ABS) and / or for delivering brake fluid from a reservoir in a wheel brake cylinder or in several wheel brake cylinders (ASR, ESP). The piston pump, for example in a brake system with slip control and / or in a steering system serving as a steering system (ESP, FDR) required. With the slip control, for example, a blocking of the wheels of the vehicle during a braking operation under heavy pressure on a brake pedal and / or spinning of driven wheels of the vehicle can be prevented. As a result, ABS therefore causes unrestricted steering of the vehicle at high deceleration and avoids whirling tendencies. An electronic brake torque control for the wheels of the vehicle is made possible.
  • at a brake system which is used as power steering (ESP) takes place independently from an operation the brake pedal or accelerator pedal a brake pressure build-up in one or a plurality of wheel brake cylinders, for example, a breaking out of the Vehicle from the track provided by the driver or a vehicle rollover to prevent (tilt prevention).
  • A stepped bore 5 of the recording body 3 takes a sealed rolling bearing 6 the drive shaft 7 on, whose free end as an eccentric 8th is formed, and in a crankcase 9 the stepped bore 5 protrudes. In principle, it is possible that the eccentric 8th directly to the drive shaft 7 or motor shaft ground, or designed as a separate component and on the drive shaft 7 is attached. With increased pump running time, it can happen that the crankcase 9 with leakage fluid, in particular with brake fluid is flooded, with one to the crank chamber 9 connected reservoir for fluid intake within the drive 2 , inside the receiving body 3 , or within the electronic control unit 4 can serve.
  • The eccentric 8th is with a one-sided by a cup-shaped outer ring 12 closed needle bearing 11 provided, whose bottom of the pot 13 with a wart-like projection selectively and friction on an end face of the drive shaft can be applied. A floor 14 of the crankcase 9 has a ball 15 so that the rotating pot bottom 13 with a motor shaft remote from the outside friction against the ball 15 is applied. The relative to the receiving body 3 rotatable outer ring 12 receives thereby no direct contact with the material of the receiving body 3 , so that due to rotation no cutting of the receiving body occurred. As a result, a frictional stress of the receiving body 3 avoided, without wear-resistant material coatings, such as anodization on walls of an aluminum receiving body 3 to have to raise.
  • As the 1 shows, are two multi-part graduated piston 16 . 17 the piston pump 10 within a stepped bore 39 . 40 movable in a bushing 18 . 19 guided arranged, pass through with a first hydraulic diameter a follow-up space 30 . 31 , and come to an end 20 . 21 in the crankcase 9 where they are the circumference of the outer ring 12 to contact. Another, slotted end 22 . 23 The piston 16 . 17 has a second hydraulically effective diameter and defines a displacement space 24 . 25 , While the second end 22 . 23 The piston 16 . 17 via a guide and sealing ring 26 . 27 in the bush 18 . 19 sealed out, allows a further guide and seal assembly 28 . 29 the arrangement of the follow-up room 30 . 31 between said seal assembly 28 . 29 and one, acting as a suction valve check valve 32 . 33 , A piston return spring 38 is firmly supported on the receiving body side and acts on the stepped piston 16 . 17 , From a pressure medium inlet E, the pressure medium passes through a channel and a filter provided on a sleeve 34 . 35 in the follow-up room 30 . 31 , In the intake stroke, the pressure medium passes when the check valve (suction valve) is open 32 . 33 into the repression room 24 . 25 and in the displacement stroke with open check valve (pressure valve) 36 . 37 in a pressure medium outlet A. It remains to add that the effective hydraulic piston diameter in the displacement chamber 24 . 25 together with the hydraulically effective diameter in the follow-up room 30 . 31 improved suction properties zählflüssigem pressure medium allows. Because with a movement of the piston in the direction of top dead center (TDC) of the follow-up space is increased, which accelerates the liquid column to be sucked. Below is in detail on a new piston pump after the 2 to 7 received.
  • A special feature of all preferred embodiments is that the spring cage 53 . 53 ' with at least one agent 44a . 44b . 44c is provided, which an opening stroke of the valve body 59 limited. This agent 44a . 44b . 44c is preferably as a mechanical stop for the valve body 59 formed so that it is blocked after a defined opening stroke by said stop to the return spring 61 To protect against overuse, the compression on block length or the like more. It is possible the means 44a . 44b . 44c form as a thigh. So that the valve body 59 has a reproducible closing behavior, are several stops on the circumference of the spring cage 53 distributed and provided at an angle to each other. In this case, an odd number of attacks is provided, with three attacks are favored in principle.
  • Overall, this provides the advantage that the maximum valve opening stroke of check valves is mechanically limited. The duration strength of a return spring 61 is thereby increased, because it is avoided that this can be compressed to its block length. Each stop can be provided as a leg, which consists of the cup-shaped receptacle for the return spring 61 disengaged, and towards the valve body 59 is bent. As a result, each leg extends substantially parallel to the piston movement direction Ax and in the direction of the stepped piston 50 to. The length of the legs determines the maximum possible stroke of the valve body 59 , The legs are on a common diameter, which is formed substantially smaller than the valve body diameter.
  • Next said leg to form a stop can further Leg be provided, which will be described in detail below. The thighs can from a circular Blechronde be unlatched.
  • From the 2 to 4 shows a first embodiment of a piston pump according to the invention, wherein with 1 Matching components are provided with matching reference numerals.
  • A stepped piston 50 limited with a tubular, hollow-shaped end 51 a repressive space 24 , The corresponding end 51 of the stepped piston 50 is stepped on the outer circumference, and carries and centers a seal assembly 26 , which in the axial direction on the one hand by a step 52 on the stepped piston 50 is held, and in the axial direction on the other hand by a spring cage 53 is held. The spring cage 53 has several tasks, on the one hand the sealing arrangement 26 secures in the axial direction, for power transmission between the piston return spring 38 and stepped pistons 50 serves, as well as for firm support and receiving the return spring 61 is used.
  • The stepped piston 50 has radially inside, related to the stage 52 , over a flat surface 54 for flat support legs 55 of the spring cage 53 , The plane edition 54 on the stepped piston 50 has a mean diameter which is substantially equal to the diameter of the piston return spring 38 matches. This occurs in the support legs 55 essentially only compressive stress.
  • To form the described tube shape has the stepped piston 50 radially inside, based on the support 54 , via a stepped bore 56 , where the bore 56 a single, collar-shaped circumferential or as shown in the drawing, a plurality of circumferentially cylinder-segment-like curved arranged, centering leg 57 of the spring cage 53 receives. This is the spring cage 53 in relation to the stepped piston 50 defined centered. As an additional measure, the spring cage 53 additional centering legs 58 for the piston return spring 38 on. The centering legs 58 can in principle - like out 2 visible - radially outside or - as out 5 visible - radially inward of the return spring 38 be arranged (external centering / Innenzentrierung 2 to 4 shows, are several Zentrierschenkel 58 provided, which the return spring 38 spill over from their end. The described centering legs 57 . 58 cause a defined centering of the piston return spring 38 in relation to the stepped piston 50 , An axial cohesion between stepped piston 50 and return spring 38 is not given.
  • especially the 3 and 4 let recognize how the support legs 55 and the centering legs 57 . 58 are alternately arranged in the circumferential direction in the preferred embodiment. The centering legs 57 . 58 are by means of webs 66 - 71 connected in a ring. For a defined edition 54 are preferably each three support legs 55 and three centering legs each 57 . 58 intended. As a result, a wobble-free support or centering is achieved. As a result, the spring cage 53 Consequently, a total of 9 differently arranged, have separate legs. These are by punching, notching, stamping or deep drawing together with a cup-shaped dome for receiving a return spring 61 made of an originally flat and circular sheet metal of constant thickness.
  • The centering legs 58 for the piston return spring 38 as well as the centering legs 57 for the spring cage 53 are each perpendicular (orthogonal) to the support legs 55 arranged. Furthermore, the centering legs 58 for the piston return spring 38 as well as the centering legs 57 for the spring cage 53 in diametrically opposite directions. This is the spring cage 53 inexpensive formable as a one-piece sheet metal part.
  • As further shown in the figures, is a valve body 59 formed spherical or plate-shaped. It is located inside the stepped bore 56 of the stepped piston 50 integrated as well as coaxial with this hole 56 aligned. Inside the hole 56 has the stepped piston 50 continue via a conical valve seat 60 , which at an axial distance to the support 54 , as well as fully integrated. The valve body 59 becomes permanent by a return spring 61 acted in the valve closing direction so that this principle on the valve seat 60 seated. For this purpose, the return spring 61 on the spring cage 53 in the area of a perforated floor 62 supported. The check valve thus formed serves to ventilate the displacement chamber 24 in the sense of Suction valve function by being suitable to the displacement space 24 to be temporarily connected to the pressure medium inlet E as a function of the prevailing pressure conditions.
  • Such created, independently manageable pump cartridge goes out of the 2 and 5 and includes stepped piston 50 , Bushing 18 , Return spring 38 , Spring cage 53 with suction valve and the sealing arrangement 26 , Here is the liner 18 at one end with a stop 63 for the stepped piston 50 provided, with the stop 63 in the radial direction smaller than the diameter of the stepped piston 50 is formed while at the opposite end of the liner 18 the abutment 41 for firm support of the piston return spring 38 is attached.
  • The pump cartridge is a subassembly simply in the receiving body 3 mountable by placing on a closure element 42 . 43 deferred and together with the seal assembly 28 into the stepped bore 39 . 40 is introduced. Because in the embodiments of the invention, an internal centering between stepped piston 50 and spring cage 53 is present, the radially outer remaining space for defined, space-saving support of the piston return spring 38 be used. The embodiment is therefore particularly suitable for piston pumps with a large piston cross section. Because the average diameter of the pad 54 on the stepped piston 50 essentially with the diameter of the piston return spring 38 is true, is a claim-appropriate training of the support legs 55 allows. Because an introduction of combined pressure and bending forces is avoided. Consequently, a better fatigue strength of the piston pump is achieved.
  • In 5 to 7 the features are additionally marked with. Because the preferred embodiment according to the 5 to 7 in large part with the above-described embodiment of the 2 to 4 below, only essential differences are discussed below. This design is mainly suitable for highly miniaturized piston pumps with a relatively small piston cross section by the material of the spring cage 53 ' starting from a perforated floor 62 ' , initially cylindrical-cup-shaped is formed, and with radially directed support legs 55a , b, c 'for the edition 54 ' Is provided.
  • The support legs 55a , b, c 'are regular on the circumference of the spring cage 53 ' arranged distributed. Preferably, there are three support legs 55a , b, c 'are provided distributed at an angle to each other on the circumference. The surface of the support legs 55a , b, c 'is clover-shaped, this clover-like extended support surface allows a reduced surface pressure with improved utilization of the sheet material.
  • In the variant after 5 to 7 meet the centering legs 57a , b, c 'for the spring cage 53 ' a dual function by being designed to simultaneously center the piston return spring 38 cause. This goal is achieved by the centering legs 57a , b, c 'in cross section as out 7 can be seen, bent U-shaped by 180 °, so that each centering leg 57a , b, c 'has a resilient leg portion 64 has, which extends substantially parallel to the cup, which for receiving the return spring 61 ' serves. The elastic leg section 64 thereby allows an improved clamping action of the spring cage 53 ' on the stepped piston 50 ' , To improve mechanical assembly is the resilient leg section 64 end with a slope 65 bent radially inward, ie in the direction of the bowl. By the slope 65 it is simplified, the piston return spring 38 mechanically on the centering legs 57a thread on, b, c '. Furthermore, a Selbstzentrierungsprozess is enabled when threading when the Zentrierschenkel 57a , b, c 'dive into the spring interior.
  • It lends itself when the different legs of each spring cage 53 . 53 ' extend parallel along a common axial longitudinal axis. This makes it possible to produce the pairs of legs in almost a single operation. The production of the spring cage 53 . 53 ' is done gradually, by in several first steps a pot with a pot collar and the bottom to be punched 62 . 62 ' is pulled. Then, the punching and bending of the individual legs takes place, including perhaps necessary Nachbiegevorgänge.
  • Of the 8th is another embodiment for small-caliber pump designs removed. This embodiment is fully consistent with the embodiment according to the features 5 to 7 so that reference is made to the description in order to avoid unnecessary repetition. Matching features are provided with matching reference numbers. Unlike the embodiment of the 5 to 7 is the spring cage 53 ' however manufactured as a chipping part from solid material. With appropriate preference, therefore, a machining is conceivable without departing from the basic inventive concept.
  • 1
    aggregate
    2
    drive
    3
    receiving body
    4
    control unit
    5
    stepped bore
    6
    roller bearing
    7
    drive shaft
    8th
    eccentric
    9
    crankcase
    10
    piston pump
    11
    needle roller bearings
    12
    outer ring
    13
    pot base
    14
    ground
    15
    Bullet
    16
    piston
    17
    piston
    18
    liner
    19
    liner
    20
    The End
    21
    The End
    22
    The End
    23
    The End
    24
    displacement space
    25
    displacement space
    26
    guide ring
    27
    guide ring
    28
    sealing arrangement
    29
    sealing arrangement
    30
    supply chamber
    31
    supply chamber
    32
    check valve
    33
    check valve
    34
    filter
    35
    filter
    36
    check valve
    37
    check valve
    38
    Piston return spring
    39
    stepped bore
    40
    stepped bore
    41
    abutment
    42
    closure element
    43
    closure element
    44a, b, c; 44'a, 44'b, 44'c
    medium
    50, 50 '
    stepped piston
    51 51 '
    The End
    52 52 '
    step
    53 53 '
    spring cage
    54 54 '
    edition
    55a, 55b, 55c; 55'a, 55'b, 55'c
    supporting leg
    56 56 '
    drilling
    57a, 57b, 57c, 57'a, 57'b, 57'c
    centering leg
    58a, 58b, 58c; 58'a, 58'b, 58'c
    centering leg
    59, 59 '
    valve body
    60 60 '
    valve seat
    61, 61 '
    Return spring
    62 62 '
    ground
    63 63 '
    attack
    64
    leg portion
    65
    slope
    66-71
    web
    e
    inlet
    A
    outlet
    Ax
    axially
    R
    radial direction

Claims (14)

  1. Piston pump ( 10 ), for conveying pressure medium in a hydraulic consumer of an electronically controlled vehicle brake system, comprising a stepped piston ( 50 . 50 ' ) in a stepped bore ( 39 . 40 ) of a receiving body ( 3 ) within a liner ( 18 . 19 ) is arranged to be movable in an axial direction Ax, the stepped piston ( 50 . 50 ' ) is at least at one end ( 51 . 51 ' ) partially tubular hollow, a displacement space ( 24 . 25 ) gets through the end ( 50 . 50 ' ) of the stepped piston ( 50 . 50 ' ) and is graduated on the outer circumference, and carries and centers a seal assembly ( 26 . 26 ' ), which in the axial direction Ax on the one hand by a stage ( 52 . 52 ' ) on the stepped piston ( 50 . 50 ' ) and on the other hand by a spring cage ( 53 . 53 ' ), radially inwardly of the seal assembly ( 26 . 26 ' ) has the stepped piston ( 50 . 50 ' ) over a flat support ( 54 . 54 ' ) for flat support legs ( 55a , b, c; 55a , b, c ') of the spring cage ( 53 . 53 ' ), the flat edition ( 54 . 54 ' ) is provided orthogonal to the axial direction Ax, radially inward of the support ( 54 . 54 ' ) has the stepped piston ( 50 . 50 ' ) via a stepped bore ( 56 . 56 ' ), whereby the bore ( 56 . 56 ' ) Centering leg ( 57a , b, c; 57a , b, c ') of the spring cage ( 53 . 53 ' ), coaxial and within the stepped bore ( 56 . 56 ' ) is a spring-biased valve body 59 . 59 ' ) arranged by a check valve, the ventilation of the displacement chamber ( 24 . 25 ), a return spring ( 38 ) is in the repression room ( 24 . 25 ), and supported on the one hand on an abutment ( 41 ) from the liner ( 18 . 19 ) and on the other hand on the spring cage ( 53 . 53 ' ), the liner ( 18 . 19 ) has at one end a stop ( 63 . 63 ' ) for the stepped piston ( 50 . 50 ' ), whereby the stop ( 63 . 63 ' ) in the radial direction R smaller than the diameter of the stepped piston ( 50 . 50 ' ) is formed, while at the opposite end of the liner ( 18 . 19 ) at least one abutment ( 41 ) for the piston return spring ( 38 ), so that stepped piston ( 50 . 50 ' ), Return spring ( 38 ), Check valve and sealing arrangement ( 26 ) as independently manageable assembly within the liner ( 18 . 19 ) are arranged.
  2. Piston pump according to claim 1, characterized in that the flat support ( 54 . 54 ' ) has a mean diameter which is substantially equal to the diameter of the piston return spring ( 38 ) matches.
  3. Piston pump according to claim 1, characterized in that the support legs ( 55a . 55b . 55c ) by means of webs ( 66 . 67 . 68 . 69 . 70 . 71 ) are annularly interconnected.
  4. Piston pump according to claim 1, characterized in that the spring cage ( 53 ) additional centering legs ( 58a , b, c) for the return spring ( 38 ) having.
  5. Piston pump according to claim 4, characterized in that the support legs ( 55a , b, c; 55a , b, c ') and the centering legs ( 57a , b, c; 57a , b, c ') of the spring cage ( 53 . 53 ' ) are provided alternately in the circumferential direction.
  6. Piston pump according to claim 4 or 5, characterized in that in each case at least three support limbs ( 55a , b, c; 55a , b, c ') and in each case at least three centering legs ( 57a , b, c; 57a , b, c ') are provided.
  7. Piston pump according to claim 4, characterized in that the centering legs ( 58a , b, c) for the return spring ( 38 ), and the centering legs ( 57a , b, c) for the spring cage ( 53 ) at right angles to the support legs ( 55a , b, c) are arranged.
  8. Piston pump according to claim 7, characterized in that the centering legs ( 57a , b, c) for the spring cage ( 53 ), and the centering legs ( 58a , b, c) for the return spring ( 38 ) in diametrically opposite directions.
  9. Piston pump according to claim 1, characterized in that the centering legs ( 57a , b, c) for the spring cage ( 53 ) and the centering legs ( 57a , b, c) for the return spring ( 38 ) are each formed separately, wherein the Zentrierschenkel ( 57a , b, c) for the return spring ( 38 ) the return spring ( 38 ) radially overlap externally.
  10. Piston pump ( 10 ), for conveying pressure medium in a hydraulic consumer of an electronically controlled vehicle brake system, comprising a stepped piston ( 50 . 50 ' ) in a stepped bore ( 39 . 40 ) of a receiving body ( 3 ) within a liner ( 18 . 19 ) is arranged to be movable in an axial direction Ax, the stepped piston ( 50 . 50 ' ) is at least at one end ( 51 . 51 ' ) partially tubular hollow, a displacement space ( 24 . 25 ) gets through the end ( 50 . 50 ' ) of the stepped piston ( 50 . 50 ' ) and is graduated on the outer circumference, and carries and centers a seal assembly ( 26 . 26 ' ), which in the axial direction Ax on the one hand by a stage ( 52 . 52 ' ) on the stepped piston ( 50 . 50 ' ) and on the other hand by a spring cage ( 53 . 53 ' ), radially inwardly of the seal assembly ( 26 . 26 ' ) has the stepped piston ( 50 . 50 ' ) over a flat support ( 54 . 54 ' ) for flat support legs ( 55a , b, c; 55a , b, c ') of the spring cage ( 53 . 53 ' ), the flat edition ( 54 . 54 ' ) is provided orthogonal to the axial direction Ax, radially inward of the support ( 54 . 54 ' ) has the stepped piston ( 50 . 50 ' ) via a stepped bore ( 56 . 56 ' ), whereby the bore ( 56 . 56 ' ) Centering leg ( 57a , b, c; 57a , b, c ') of the spring cage ( 53 . 53 ' ), coaxial and within the stepped bore ( 56 . 56 ' ) is a spring-biased valve body 59 . 59 ' ) arranged by a check valve, the ventilation of the displacement chamber ( 24 . 25 ), a return spring ( 38 ) is in the repression room ( 24 . 25 ), and supported on the one hand on an abutment ( 41 ) from the liner ( 18 . 19 ) and on the other hand on the spring cage ( 53 . 53 ' ), the liner ( 18 . 19 ) has at one end a stop ( 63 . 63 ' ) for the stepped piston ( 50 . 50 ' ), whereby the stop ( 63 . 63 ' ) in the radial direction R smaller than the diameter of the stepped piston ( 50 . 50 ' ) is formed, while at the opposite end of the liner ( 18 . 19 ) at least one abutment ( 41 ) for the piston return spring ( 38 ), so that stepped piston ( 50 . 50 ' ), Return spring ( 38 ), Check valve and sealing arrangement ( 26 ) as an independently manageable assembly within the liner ( 18 . 19 ) are arranged, characterized in that the Zentrierschenkel ( 57a , b, c ') for the spring cage ( 53 ' ) and leg sections ( 64a , b, c) for centering the return spring ( 38 ) are integrally formed, wherein the leg portions ( 64a , b, c) radially inward into the helical return spring ( 38 ) intervene.
  11. Piston pump ( 10 ), for conveying pressure medium in a hydraulic consumer of an electronically controlled vehicle brake system, comprising a stepped piston ( 50 . 50 ' ) in a stepped bore ( 39 . 40 ) of a receiving body ( 3 ) within a liner ( 18 . 19 ) is arranged to be movable in an axial direction Ax, the stepped piston ( 50 . 50 ' ) is at least at one end ( 51 . 51 ' ) partially tubular hollow, a displacement space ( 24 . 25 ) gets through the end ( 50 . 50 ' ) of the stepped piston ( 50 . 50 ' ) and is graduated on the outer circumference, and carries and centers a seal assembly ( 26 . 26 ' ), which in the axial direction Ax on the one hand by a stage ( 52 . 52 ' ) on the stepped piston ( 50 . 50 ' ) and on the other hand by a spring cage ( 53 . 53 ' ), radially inwardly of the seal assembly ( 26 . 26 ' ) has the stepped piston ( 50 . 50 ' ) over a flat support ( 54 . 54 ' ) for flat support legs ( 55a , b, c; 55a , b, c ') of the spring cage ( 53 . 53 ' ), the flat edition ( 54 . 54 ' ) is provided orthogonal to the axial direction Ax, radially inward of the support ( 54 . 54 ' ) has the stepped piston ( 50 . 50 ' ) via a stepped bore ( 56 . 56 ' ), whereby the bore ( 56 . 56 ' ) Centering leg ( 57a , b, c; 57a , b, c ') of the spring cage ( 53 . 53 ' ), coaxial and within the stepped bore ( 56 . 56 ' ) is a spring-biased valve body 59 . 59 ' ) arranged by a check valve, the ventilation of the working space ( 24 . 25 ), a return spring ( 38 ) is in the repression room ( 24 . 25 ), and supported on the one hand on an abutment ( 41 ) from the liner ( 18 . 19 ) and on the other hand on the spring cage ( 53 . 53 ' ), the liner ( 18 . 19 ) has at one end a stop ( 63 . 63 ' ) for the stepped piston ( 50 . 50 ' ), whereby the stop ( 63 . 63 ' ) in the radial direction R smaller than the diameter of the stepped piston ( 50 . 50 ' ) is formed, while at the opposite end of the liner ( 18 . 19 ) at least one abutment ( 41 ) for the piston return spring ( 38 ), so that stepped piston ( 50 . 50 ' ), Return spring ( 38 ), Check valve and sealing arrangement ( 26 ) as an independently manageable assembly within the liner ( 18 . 19 ) are arranged, characterized in that the spring cage ( 53 . 53 ' ) Medium ( 44a , b, c; 44a , b, c ') having an opening stroke of the valve body ( 59 . 59 ' ) limit.
  12. Piston pump according to claim 11, characterized in that the means ( 44a , b, c; 44a , b, c ') are designed as legs, on which the valve body ( 59 . 59 ' ) strikes after a defined opening stroke.
  13. Piston pump according to claim 12, characterized in that the legs in the circumferential direction of the spring cage ( 53 . 53 ' ) are arranged distributed.
  14. Piston pump ( 10 ), for conveying pressure medium in a hydraulic consumer of an electronically controlled vehicle brake system, comprising a stepped piston ( 50 . 50 ' ) in a stepped bore ( 39 . 40 ) of a receiving body ( 3 ) within a liner ( 18 . 19 ) is arranged to be movable in an axial direction Ax, the stepped piston ( 50 . 50 ' ) is at least at one end ( 51 . 51 ' ) partially tubular hollow, a displacement space ( 24 . 25 ) gets through the end ( 50 . 50 ' ) of the stepped piston ( 50 . 50 ' ) and is graduated on the outer circumference, and carries and centers a seal assembly ( 26 . 26 ' ), which in the axial direction Ax on the one hand by a stage ( 52 . 52 ' ) on the stepped piston ( 50 . 50 ' ) and on the other hand by a spring cage ( 53 . 53 ' ), radially inwardly of the seal assembly ( 26 . 26 ' ) has the stepped piston ( 50 . 50 ' ) over a flat support ( 54 . 54 ' ) for flat support legs ( 55a , b, c; 55a , b, c ') of the spring cage ( 53 . 53 ' ), the flat edition ( 54 . 54 ' ) is provided orthogonal to the axial direction Ax, radially inward of the support ( 54 . 54 ' ) has the stepped piston ( 50 . 50 ' ) via a stepped bore ( 56 . 56 ' ), whereby the bore ( 56 . 56 ' ) Centering leg ( 57a , b, c; 57a , b, c ') of the spring cage ( 53 . 53 ' ), coaxial and within the stepped bore ( 56 . 56 ' ) is a spring-biased valve body 59 . 59 ' ) arranged by a check valve, the ventilation of the working space ( 24 . 25 ), a return spring ( 38 ) is in the repression room ( 24 . 25 ), and supported on the one hand on an abutment ( 41 ) from the liner ( 18 . 19 ) and on the other hand on the spring cage ( 53 . 53 ' ), the liner ( 18 . 19 ) has at one end a stop ( 63 . 63 ' ) for the stepped piston ( 50 . 50 ' ), whereby the stop ( 63 . 63 ' ) in the radial direction R smaller than the diameter of the stepped piston ( 50 . 50 ' ) is formed, while at the opposite end of the liner ( 18 . 19 ) at least one abutment ( 41 ) for the piston return spring ( 38 ), so that stepped piston ( 50 . 50 ' ), Return spring ( 38 ), Check valve and sealing arrangement ( 26 ) as an independently manageable assembly within the liner ( 18 . 19 ) are arranged, characterized in that the spring cage ( 53 . 53 ' ) is formed as an integral sheet metal part, that the material of the spring cage ( 53 . 53 ' ) has a uniform thickness, and that limbs and stops are provided as notches or forms of the sheet material.
DE200510043266 2004-10-15 2005-09-12 Piston pump Withdrawn DE102005043266A1 (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
DE102004050579.9 2004-10-15
DE102004050579 2004-10-15
DE200510043266 DE102005043266A1 (en) 2004-10-15 2005-09-12 Piston pump

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DE200510043266 DE102005043266A1 (en) 2004-10-15 2005-09-12 Piston pump
EP20050108940 EP1647461B1 (en) 2004-10-15 2005-09-28 Piston pump
DE200550010670 DE502005010670D1 (en) 2004-10-15 2005-09-28 Piston pump
US11/248,119 US7390174B2 (en) 2004-10-15 2005-10-12 Piston pump

Publications (1)

Publication Number Publication Date
DE102005043266A1 true DE102005043266A1 (en) 2006-04-20

Family

ID=35559363

Family Applications (2)

Application Number Title Priority Date Filing Date
DE200510043266 Withdrawn DE102005043266A1 (en) 2004-10-15 2005-09-12 Piston pump
DE200550010670 Active DE502005010670D1 (en) 2004-10-15 2005-09-28 Piston pump

Family Applications After (1)

Application Number Title Priority Date Filing Date
DE200550010670 Active DE502005010670D1 (en) 2004-10-15 2005-09-28 Piston pump

Country Status (3)

Country Link
US (1) US7390174B2 (en)
EP (1) EP1647461B1 (en)
DE (2) DE102005043266A1 (en)

Families Citing this family (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4857731B2 (en) * 2005-11-24 2012-01-18 株式会社アドヴィックス Brake device for vehicle
US7850253B2 (en) * 2006-08-16 2010-12-14 Parker-Hannifin Corporation Hydraulic braking power unit
KR100827272B1 (en) * 2007-04-09 2008-05-07 주식회사 만도 A pump for electronic control brake system
KR100882791B1 (en) 2007-04-09 2009-02-09 주식회사 만도 A pump for electronic control brake system
KR100888184B1 (en) 2007-04-09 2009-03-10 주식회사 만도 A pump for electronic control brake system
JP5034705B2 (en) * 2007-06-18 2012-09-26 株式会社アドヴィックス Piston pump
US7837447B2 (en) * 2007-07-23 2010-11-23 Medica Corporation Diluter pump for chemistry analyzers
DE102007052756A1 (en) * 2007-11-06 2009-05-07 Robert Bosch Gmbh Plastic element, piston pump and assembly process
CN102042416B (en) * 2009-10-09 2012-11-21 浙江三花股份有限公司 Electronic expansion valve
DE102009054520A1 (en) * 2009-12-10 2011-06-16 Robert Bosch Gmbh Piston pump
ITMI20122075A1 (en) * 2012-12-05 2014-06-06 Bosch Gmbh Robert Unit 'pumping to supply fuel, preferably diesel fuel, to an internal combustion engine
DE102012223186A1 (en) * 2012-12-14 2014-06-18 Robert Bosch Gmbh Piston of a piston pump of a vehicle brake system

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6042350A (en) * 1995-07-27 2000-03-28 Itt Manufacturing Enterprises Inc. Piston pump
DE10019403A1 (en) * 2000-04-19 2001-10-25 Bosch Gmbh Robert Check valve for piston pump has holding component for valve shut-off element and is movably connected to it and formed in one piece with it
EP0734494B2 (en) * 1993-12-17 2003-05-28 Lucas Industries Limited Reciprocating pump for pumping hydraulic fluid

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4027794C2 (en) * 1990-09-01 2002-06-20 Continental Teves Ag & Co Ohg Hydraulic radial piston pump
WO1995003198A1 (en) * 1993-07-23 1995-02-02 Itt Automotive Europe Gmbh Hydraulic braking system with skid and drive slip control
WO1998012434A1 (en) * 1996-09-19 1998-03-26 Robert Bosch Gmbh Piston pump
DE19732810B4 (en) 1997-07-30 2013-05-23 Robert Bosch Gmbh Check valve, in particular for a piston pump
EP0932764A1 (en) * 1997-07-30 1999-08-04 Robert Bosch Gmbh Piston pump
DE19800500A1 (en) * 1998-01-09 1999-07-15 Bosch Gmbh Robert piston pump
DE19829546A1 (en) * 1998-07-02 2000-01-13 Bosch Gmbh Robert Radial piston pump
US6901844B2 (en) * 2002-07-02 2005-06-07 Stanadyne Corporation Guided shoe for radial piston pump
DE19918122A1 (en) * 1999-04-22 2000-11-23 Bosch Gmbh Robert piston pump
FR2817522B1 (en) * 2000-12-06 2003-04-04 Bosch Gmbh Robert master cylinder piston and device for mounting a valve in the piston
DE10249909A1 (en) 2002-10-26 2004-05-06 Continental Teves Ag & Co. Ohg piston pump
DE10346237A1 (en) 2003-02-12 2004-09-09 Continental Teves Ag & Co. Ohg piston pump

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0734494B2 (en) * 1993-12-17 2003-05-28 Lucas Industries Limited Reciprocating pump for pumping hydraulic fluid
US6042350A (en) * 1995-07-27 2000-03-28 Itt Manufacturing Enterprises Inc. Piston pump
DE10019403A1 (en) * 2000-04-19 2001-10-25 Bosch Gmbh Robert Check valve for piston pump has holding component for valve shut-off element and is movably connected to it and formed in one piece with it

Also Published As

Publication number Publication date
US7390174B2 (en) 2008-06-24
EP1647461A3 (en) 2007-09-19
EP1647461B1 (en) 2010-12-15
DE502005010670D1 (en) 2011-01-27
US20060083629A1 (en) 2006-04-20
EP1647461A2 (en) 2006-04-19

Similar Documents

Publication Publication Date Title
US5722738A (en) Hydraulic brake system with brake slip control and traction slip control
EP0387506B1 (en) Hydraulic high-pressure pump for a brake system of a vehicle
US6224352B1 (en) Piston pump in a brake system of a vehicle
EP2076669B1 (en) Tappet assembly for a high-pressure pump and high-pressure pump comprising at least one tappet assembly
US20090252621A1 (en) High pressure fuel pump
EP1834089B1 (en) Piston pump, particularly a high-pressure fuel pump for an internal combustion engine
EP0935719B1 (en) Non-return valve, especially for a piston pump
US6520756B1 (en) Piston pump
US6389955B1 (en) Pump assembly for a slip-controlled hydraulic brake system for a vehicle
US20010002978A1 (en) Idle volume reducing means in a piston pump for a brake system of a vehicle
KR100523678B1 (en) Piston pumps
JP4574765B2 (en) Piston pump
DE19750851A1 (en) piston pump
CN100532883C (en) Hydraulic tensioner
US3221564A (en) Piston shoe construction for axial piston pump
KR100808387B1 (en) Pump aggregate for a hydraulic vehicle braking system
WO2007036423A1 (en) High pressure pump, in particular for a fuel injection device of an internal combustion engine
DE10355027A1 (en) High-pressure pump, in particular for a fuel injection device of an internal combustion engine
EP1101035B1 (en) Piston pump
DE19820902A1 (en) Piston pump for a vehicle hydraulic brake system
GB2248277A (en) Hydraulic radial-type piston pump.
EP1573200A1 (en) Axial piston engine
JP4354536B2 (en) Hydraulic device
DE10252231A1 (en) Solenoid valve, in particular for slip-controlled automotive vehicle brake systems
GB2210418A (en) Swashplate compressor for air conditioning systems

Legal Events

Date Code Title Description
OM8 Search report available as to paragraph 43 lit. 1 sentence 1 patent law
R120 Application withdrawn or ip right abandoned
R120 Application withdrawn or ip right abandoned

Effective date: 20111210